Arm exercising attachment for an exercising bicycle



FIG. 1 is a perspective view of an arm exercising attachment for an exercising bicycle showing my new design;

FIG. 2 is a side elevational view thereof;

FIG. 3 is a front elevational view thereof; and,

FIG. 4 is a top plan view thereof.

The broken lines suggesting an exercising bicycle in FIG. 1 are for purposes of showing environment only. 

The ornamental design for an arm exercising attachment for an exercising bicycle, as shown and described. 